摘要
As a type of reciprocating machine, the reciprocating compressor has a compact structure and many excitation sources.Once the small end bearing of the connecting rod is worn, it is easy to cause the sintering of the bearing and the abnormal vibration of the body.Based on the characteristics of poor lubrication state and complex force of connecting rod small head bearing, a mixed lubrication model considering oil groove feed was established, and the dynamic simulation of the reciprocating compressor model with lubricated bearings was carried out;considering different speeds and gas load conditions, the law of the impact of the eigenvalues changing with working conditions was explored.The fault simulation experiment was carried out by selecting representative working conditions, which verified the correctness of the simulation method.The study found that two contact collisions between the pin and the bearing bush occurred in one cycle, the collision impact was more severe under the wear fault, and the existence of the gap made the dynamic response more sensitive to the change of working conditions.This research provides ideas for the location and feature extraction of fault symptom signal angular segments in the process of complex measured signal processing.
作者
张进杰
SONG Chunyu
LEI Fuchang
WANG Yao
ZHI Haifeng
LIU Fengchun
ZHANG Jinjie;SONG Chunyu;LEI Fuchang;WANG Yao;ZHI Haifeng;LIU Fengchun(Beijing Key Laboratory of Health Monitoring and Self-Healing of High-end Mechanical Equipment,Beijing University of Chemical Technology,Beijing 100029,P.R.China;China North Engine Research Institute(Tianjin),Tianjin 300400,P.R.China)
基金
Supported by the National Natural Science Foundation of China (No.52101343)。
